圆不锈钢管混凝土短柱偏压性能试验研究  

Eccentric Compression Performance Test of Circular Concrete⁃filled Stainless Steel Tube Short Column

作　　者：杨俊 谭占进 魏叔彬 唐红元 唐泓彬[3] YANG Jun;TAN Zhanjin;WEI Shubin;TANG Hongyuan;TANG Hongbin(China Railway No.5 Engineering Group Construction Engineering Co.Ltd.,Guiyang 550081,China;School of Civil Engineering,Sichuan University of Science and Engineering,Zigong Sichuan 643000,China;Institute of Structure Engineering,Xihua University,Chengdu 610039,China)

机构地区：[1]中铁五局集团建筑工程有限责任公司,贵阳550081 [2]四川轻化工大学土木工程学院,四川自贡643000 [3]西华大学结构工程研究所,成都610039

出　　处：《铁道建筑》2024年第11期7-16,共10页Railway Engineering

基　　金：贵州省科技支撑计划(黔科合支撑[2021]一般358)。

摘　　要：为研究圆形不锈钢管混凝土(Concrete-Filled Stainless Steel Tube,CFSST)短柱的偏压力学性能,本文对12根圆形CFSST短柱开展偏压试验,分析构件破坏过程、破坏形态、荷载-位移曲线、荷载-应变曲线、侧向挠度分布曲线,以及极限承载力等偏压力学性能指标。结果表明:圆形CFSST短柱的极限承载力随含钢率的增大而逐渐增大,随偏心率的增大而逐渐减小。通过国内外规范计算得到承载力,并将计算值与试验值进行对比,发现部分规范对圆形CFSST短柱偏压承载力预测结果偏差较大,而JCJ 01—1989《钢管混凝土结构设计与施工规程》计算结果最接近试验结果,推荐采用该规范预测圆形CFSST短柱偏压承载力。To study the eccentric compression mechanical properties of circular concrete-filled stainless steel tube concrete(CFSST)short columns,this paper conducted eccentric compression experiments on 12 circular CFSST short columns,analyzing the effects of steel content and eccentricity on the compressive failure process,failure mode,load displacement curve,load strain curve,lateral deflection distribution curve along the column height,and ultimate bearing capacity of the components.The results indicate that the ultimate bearing capacity of circular CFSST short columns gradually increases with the increase of steel content and gradually decreases with the increase of eccentricity.Comparing the bearing capacity calculation of some domestic and foreign standards and regulations,and comparing the calculated values with the experimental values,it was found that some regulations have a significant deviation in predicting the eccentric compressive bearing capacity of circular CFFST short columns,while JCJ 01—1989 Design and Construction Regulations for Steel Tube Concrete Structures calculation results are closest to the experimental results.It is recommended to use this code to predict the eccentric compressive bearing capacity of circular CFFST short columns.

关 键 词：圆形不锈钢管混凝土(CFSST) 偏压承载力 偏压试验 理论计算 含钢率 偏心率 

分 类 号：U443.22[建筑科学—桥梁与隧道工程]